Department of Biology, Syracuse University, Syracuse, NY 13210, U.S.A.
Department of Plant Pathology, University of California, Davis, Salinas, CA 93905, U.S.A.
Mol Plant Microbe Interact. 2020 May;33(5):754-766. doi: 10.1094/MPMI-11-19-0329-R. Epub 2020 Mar 24.
() of is a widely conserved gene of unknown function that has been extensively used as a marker of plant senescence. induction occurs during plant cell death processes, including senescence and hypersensitive response, a type of programmed cell death that occurs in response to pathogens. This implies that expression is regulated through at least two different signaling pathways affecting these two different processes. Our work highlights a contrasting role for SAG13 in regulating resistance against disease-causing biotrophic bacterial and necrotrophic fungal pathogens with contrasting infection strategies. We provide further evidence that is not only induced during oxidative stress but also plays a role in protecting the plant against other stresses. SAG13 is also required for normal seed germination, seedling growth, and anthocyanin accumulation. The work presented here provides evidence for the role of SAG13 in regulating multiple plant processes including senescence, defense, seed germination, and abiotic stress responses. is a valuable molecular marker for these processes and is conserved in multiple plant species, and this knowledge has important implications for crop improvement.
SAG13 基因的功能未知，它是一个在植物中广泛保守的基因，被广泛用作植物衰老的标记。该基因的诱导表达发生在植物细胞死亡过程中，包括衰老和过敏性反应，这是一种程序性细胞死亡，发生在对病原体的反应中。这意味着 SAG13 的表达受到至少两种不同信号通路的调控，影响着这两种不同的过程。我们的工作强调了 SAG13 在调节对具有不同感染策略的致病生物亲和细菌和坏死真菌病原体的抗性方面的对比作用。我们进一步的证据表明，不仅在氧化胁迫期间诱导 SAG13 的表达，而且在保护植物免受其他胁迫方面也发挥作用。SAG13 对于正常的种子萌发、幼苗生长和花色素苷积累也是必需的。这里介绍的工作为 SAG13 在调节包括衰老、防御、种子萌发和非生物胁迫反应等多种植物过程中的作用提供了证据。SAG13 是这些过程的有价值的分子标记，在多种植物物种中保守，这一知识对作物改良具有重要意义。
